Marcus Vinicius may refer to:

• Marcus Vinicius (consul 19 BC), Roman consul and general
• Marcus Vinicius (consul 30), Roman consul
• Marcus Vinícius (footballer, born 1963), Brazilian footballer
• Marcus Vinícius Cesário (born 1986), Brazilian footballer
• Marcus Vinicius D'Almeida (born 1998), Brazilian archer
• Marcus Vinicius de Souza (born 1984), Brazilian basketball player
• Marcus Vinicius de Morais (born 1974), Brazilian footballer
• Marcus Vinícius da Cruz Alves Nóbrega (born 1983), Brazilian footballer
• Marcus Vinícius Dias (1923–1992), Brazilian basketball player
• Marcus Vinícius Simões Freire (born 1962), Brazilian former volleyball player
• Marcus Vinicius Urban Toledo dos Reis (born 1986), Brazilian/Spanish basketball player
• Marcus Vinícius Lima da Silva (born 1990), Brazilian footballer
• Vinicius de Moraes (Marcus Vinicius da Cruz de Mello Moraes, 1913–1980), Brazilian musician
• Marcus Vinicius da Silva de Oliveira, Brazilian footballer
• Marcus Vinícius Vidal Cunha (born 1992), Brazilian footballer
• Marcus Vinicius Molinari Reis (1997–2021), Brazilian footballer